<%@ page isELIgnored="false"%>
<%@ page import="java.util.ArrayList" %>
<%@ page import="java.util.HashMap" %><%--
  Created by IntelliJ IDEA.
  User: gz
  Date: 2025/02/17
  Time: 12:07
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<%
  request.setAttribute("k1",new ArrayList<>());
  request.setAttribute("k2",new HashMap<>());
  request.setAttribute("k3",new Object[]{});
%>
k1是否为空= ${empty k1} <br>
k2是否为空= ${empty k2} <br>
k3是否为空= ${empty k3} <br>
</body>
</html>
